1.,Preheat the oven to 350 degrees F. Place the shrimp in a baking dish.,Sprinkle the onions and tomatoes on top.,2.,Melt the butter in a small bowl in the microwave and let cool for several minutes.,Pour in the Worcestershire, lemon juice, red pepper flakes, garlic, and ground pepper and mix.,Pour over the shrimp and cover the baking dish with foil.,3.,______,Stir and re-cover, then bake for about another 10 minutes or until the shrimp are red and firm.,4.,Remove from the oven and stir.,Sprinkle with parsley.,Ladle the shrimp and sauce over pasta or rice and serve with crusty bread to soak up all of the sauce.